Unexpected error 0x8ffe2740 due to Skype

IIS is not willing to start anymore. At least in the Microsoft Knowledge Base you can find a hint for this problem. So first, I thought it could be all the beta WinFX and Indigo stuff, I have installed on my machine. Finally, I found the reason: Skype grabbed port 80. After closing Skype I was able to restart the IIS.